GLM 5.3 FlashX now available on AI Gateway

GLM 5.3 FlashX is now available on AI Gateway.

GLM 5.3 FlashX is a high-speed serving option for Z.ai's multimodal coding model, delivering inference at ~200 tokens per second for faster streamed responses.

The higher serving speed is useful for coding agents, tool loops, and interactive applications where users wait on generated output.

Use zai/glm-5.3-flashx across API formats and in coding agents:

API

import { streamText } from 'ai';
const result = streamText({  model: 'zai/glm-5.3-flashx',  prompt: 'Name three checks to run after deploying a latency-sensitive API',});
for await (const text of result.textStream) {  process.stdout.write(text);}

View model details ↗

To use it in a coding agent, see the coding agents guide, then run vercel ai-gateway setup to create a key and configure your supported agents. Select zai/glm-5.3-flashx inside the agent.

AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting, budgets for API keys, routing rules, and more.

AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on Bring Your Own Key (BYOK) requests.

Try GLM-5.3-FlashX in the model playground, or view all language models available on AI Gateway.